AU2009277429A1 - Roller mill for grinding particulate material - Google Patents

Roller mill for grinding particulate material Download PDF

Info

Publication number
AU2009277429A1
AU2009277429A1 AU2009277429A AU2009277429A AU2009277429A1 AU 2009277429 A1 AU2009277429 A1 AU 2009277429A1 AU 2009277429 A AU2009277429 A AU 2009277429A AU 2009277429 A AU2009277429 A AU 2009277429A AU 2009277429 A1 AU2009277429 A1 AU 2009277429A1
Authority
AU
Australia
Prior art keywords
roller
mill
grinding table
mill housing
rollers
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
AU2009277429A
Inventor
Alexander Helm
Bent Horning
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
FLSmidth AS
Original Assignee
FLSmidth AS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by FLSmidth AS filed Critical FLSmidth AS
Publication of AU2009277429A1 publication Critical patent/AU2009277429A1/en
Abandoned legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B02CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02CCRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C15/00Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
    • B02C15/001Air flow directing means positioned on the periphery of the horizontally rotating milling surface
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B02CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02CCRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C15/00Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
    • B02C15/04Mills with pressed pendularly-mounted rollers, e.g. spring pressed
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B02CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02CCRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C15/00Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
    • B02C15/14Edge runners, e.g. Chile mills
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00Technologies relating to the processing of minerals
    • Y02P40/10Production of cement, e.g. improving or optimising the production methods; Cement grinding

Abstract

A roller mill for grinding particulate material such as for example cement raw materials, cement clinker and similar materials, said roller mill comprising a mill housing enclosing a grinding table and a set of rollers rotatable about a vertical shaft. The set of rollers are configured for interactive operation with the grinding table and comprising a number of rollers each rotating about a roller shaft which is connected to the vertical shaft via a hinged connection with a center of rotation which allows a free circular movement of the roller in upward and downward direction in a plane comprising the centerline of the roller shaft. The center of rotation of the hinged connection in a vertical plane is located under the centerline of the roller shaft. The grinding table is rotatable about the vertical shaft and the roller mill may include mechanisms or devices that are sized and configured to introduce gases into the mill housing and may also include mechanisms or devices configured to allow for continuously diverting ground material suspended in gases out of the mill housing.

Description

WO 2010/012527 PCT/EP2009/056694 ROLLER MILL FOR GRINDING PARTICULATE MATERIAL The present invention relates to a roller mill for grinding particulate material such as cement raw materials, cement clinker and similar materials, said roller mill comprising a mill housing enclosing a grinding table and a set of rollers rotatable about a vertical shaft, said set of rollers being configured for interactive operation with the grinding table and comprising a number of rollers each rotating about a roller shaft which is connected to the vertical shaft via a hinged connection with a centre of rotation which allows a free circular movement of the roller in upward and downward direction in a plane comprising the centreline of the roller shaft, with said centre of rotation of the hinged connection in a vertical plane being located under the centreline of the roller shaft. A machine of the aforementioned kind is known from DE 2061422 Al. This mixing machine comprises a stationary mixing table and a number of rollers configured for interactive operation with the mixing table. Each roller rotates about a separate roller shaft, which is connected to a vertical shaft via a hinged connection. The centre of rotation for the hinged connection allows a free circular movement of the roller in upward and downward direction in a plane comprising the centreline of the roller shaft. The centre of rotation of the hinged connection is located under the horizontal centreline of the roller shaft. In this way the centrifugal force, which during the operation of the mill acts upon the roller, will produce a turning moment around the hinge and hence a force directed downward against the grinding table. This mixing machine is used in foundries for mixing water, sand and binding materials to a viscous mass of moulding sand. The mixing table is formed with walls so as to form a bowl to prevent water to escape from the mixing process. This process is not continuous since the mixing machine has to be stopped and the viscous mass of finished moulding sand has to be removed before a new batch of water, sand and binding materials can be fed to the machine. Such stops causing considerable down-time of the machine are expensive in terms of time and furthermore it is a labour-intensive task to remove the finished moulding sand.
WO 2010/012527 PCT/EP2009/056694 2 It is the objective of the present invention to provide a roller mill with a continuous operation in order to eliminate the aforementioned disadvantages. 5 This is obtained by means of a roller mill of the kind mentioned in the introduction and being characterized in that the grinding table is rotatable about the vertical shaft and in that the roller mill comprises means for introducing gases into the mill housing and means allowing for continuously diverting ground material suspended in gases out of the mill housing. 10 It is hereby obtained that the grinding process is made continuously as the material fed to the grinding table is transported across the grinding table, by means of the centrifugal forces to which the material is subjected due to the rotation of the grinding table, to the rollers where it is ground and subsequently 15 suspended in the gas introduced in the mill housing, whereafter the ground material in suspended form is diverted through an outlet connected to the mill housing. The means for introducing gases into the mill housing for continuous diversion, 20 through an outlet, of ground material suspended in gases may in principle be constituted by any suitable means. The means may be positioned at any location in the mill as long as they will ensure that gases are introduced in appropriate manner. The nozzles may be positioned horizontally in the wall of the mill housing, immediately above the grinding table so that they allow the gases to be 25 introduced radially relative to the grinding table. One or more of the nozzles may be movably mounted to allow the angle relative to the horizontal grinding table to be altered. Hence it will be possible to adjust the nozzles in order to optimize the efficiency of the gases introduced. The means for introducing gases into the mill housing may further comprise a number of vertical louvres being movably 30 arranged around the grinding table so that the introduction of the gases can be controlled by adjusting the angles of the louvres. The ground material WO 2010/012527 PCT/EP2009/056694 3 suspended in gases may be extracted through an outlet connected to the upper part of the mill housing by means of a fan. In another embodiment the means for introducing gases into the mill housing 5 comprises a number of nozzles arranged in a nozzle ring enclosing the grinding table allowing the gases to be introduced around the edge of the grinding table. In a further embodiment the means for introducing gases into the mill housing comprises two or more separate feed systems each comprising means such as a 10 fan for introducing gases into the mill housing. One system could be capable of introducing gases through a nozzle ring enclosing the grinding table, whereas the second system could be capable of introducing gases through nozzles which are mounted in the mill housing. Hence it is possible to introduce the atmospheric air surrounding the roller mill through one system and hot gases 15 through the second system or conversely. To ensure energy efficiency, it would be advantageous to distribute the gas flow into a cold flow which is blown into the roller mill and into a hot flow which is sucked into the roller mill by a fan at a relatively low pressure loss. Furthermore, some of the gases being introduced into the mill housing should advantageously be made up of atmospheric air since 20 this would lessen the requirements imposed upon the materials and components of the feed system as compared to a feed system for introducing hot gases. The relationship between the quantity of hot gases and air, respectively, must be optimized relative to the process in the mill in order to minimize the energy consumption for the grinding process and the airflow process. For all types of 25 nozzles, the gases can either be blown or sucked through the nozzles. Atmospheric air for one feed system may, for example, be introduced by blowing the air up through a nozzle ring around the grinding table using a fan while hot gases for the second feed system may be introduced by sucking the gases through nozzles in the mill housing by means of a second fan which is 30 connected to the outlet at the top of the mill housing. The converse situation with hot gases through the nozzle ring and atmospheric air through the nozzles in the WO 2010/012527 PCT/EP2009/056694 4 mill housing or an embodiment with hot gases in both feed systems would also be applicable. All the mentioned means for introducing gases in the mill housing can be 5 combined with each other in order to achieve an optimum gas flow in the mill housing. In order to attain a high a speed of rolling, defined as the relative speed between the rollers and the grinding table, and hence a high capacity of the mill, it is preferred that the set of rollers and the grinding table are turned in opposite 10 directions. For smaller mills the speed of rotation of the rollers must exceed that applied in bigger mills in order to achieve a desired pressure contribution from the centrifugal force which during the operation of the mill acts upon the roller and 15 produces a turning moment around the hinge and hence a force directed downward against the grinding table. Furthermore the grinding table must have a certain speed of rotation to enable the centrifugal force to transport the material towards its peripheral edge. Therefore the speed of rolling in small mills may become so high as to involve operational problems in terms of vibrations and 20 similar occurrences. In small mills, it is therefore preferred that the rollers and the grinding table are turned in the same direction. The invention will now be described in further details with reference to the drawing, being diagrammatical, and where 25 Fig. 1 shows a sectional view of a roller mill according to the invention, and Fig. 2 shows a sectional view of another embodiment of a roller mill according to the invention. 30 In Fig. 1 is seen a sectional view of a roller mill 1 which comprises a horizontal grinding table 3 whereto raw material to be ground through an inlet (not shown) WO 2010/012527 PCT/EP2009/056694 5 is continuously fed, and a set of rollers comprising a number of rollers 5 operating interactively therewith, with the set of rollers being connected to and turning about a vertical shaft 4. The rollers 5 turn about separate roller shafts 6 which are connected to the vertical shaft 4 via a hinged connection 7 which 5 allows the rollers 5, when turning about this connection, to move freely up and down in a plane which comprises the centreline 9 of the roller shaft 6. According to the invention the centre 8 of rotation of the hinged connection 7, viewed in a vertical plane, is located under the centreline 9 of the roller shaft 6. As a result, the centrifugal force which during the operation of the mill acts upon the rollers 10 5, the roller shafts 6 and the upper part of the hinged connections 7 will produce a turning moment about the hinged connection 7 and hence a downwardly directed force which contributes to the grinding pressure of the rollers 5 against the grinding table 3. 15 Nozzles 10 for introducing gases are mounted in the wall of the mill housing 2. The nozzles 10 can be positioned horizontally in the mill housing above the grinding table, thereby introducing gases into the mill housing 2 radially relative to the grinding table 3, or be movably mounted so that the angle relative to the horizontal grinding table 3 can be altered. Furthermore a number of nozzles are 20 arranged in a nozzle ring 11 enclosing the grinding table allowing the gases to be introduced around the edge of the grinding table. The ground material suspended in the introduced gases is extracted by a fan through an outlet 12 in the upper part of the mill housing 2. 25 Fig. 2 shows a sectional view of an embodiment of the invention where the roller mill 1 comprises two separate feed systems for introducing gases into the mill housing 2. The first system introduces gases through the nozzle ring 11 enclosing the grinding table 3, whereas the second system introduces gases through the nozzles 10 mounted in the mill housing 2. Hence it is possible to 30 introduce hot gases through the first system and the atmospheric air surrounding the roller mill through the second system. A fan 14 in the first feed system, placed after the outlet 12, sucks hot gases through the nozzle ring 11, whereas a WO 2010/012527 PCT/EP2009/056694 6 fan 13 in the second feed system blows atmospheric air through the nozzles 10 which are mounted in the wall of the mill housing 2. The converse situation with hot gases through the nozzles 10 in the mill housing and atmospheric air through the nozzle ring 11 or an embodiment with hot gases in both feed 5 systems would also be applicable. The grinding table 3 is turned at a certain speed of rotation in order to move the material across the grinding table 3 towards its peripheral edge by means of the centrifugal force. In order to attain a high speed of rolling, defined as the relative 10 speed between the rollers 5 and the grinding table 3, and hence a high capacity of the mill, it is preferred that the set of rollers and the grinding table 3 are turned in opposite directions. For smaller mills the speed of rotation of the roller set must, however, exceed that applied in bigger mills in order to achieve the desired grinding pressure. For avoidance of operational problems in terms of 15 vibrations and similar occurrences in case of excessive speeds of rolling, it is therefore preferred that the set of rollers and the grinding table 3 are turned in the same direction in small mills. 20

Claims (9)

1. A roller mill (1) for grinding particulate material such as cement raw materials, cement clinker and similar materials, said roller mill (1) comprising a mill housing 5 (2) enclosing a grinding table (3) and a set of rollers rotatable about a vertical shaft (4), said set of rollers being configured for interactive operation with the grinding table (3) and comprising a number of rollers (5) each rotating about a roller shaft (6) which is connected to the vertical shaft (4) via a hinged connection (7) with a centre of rotation (8) which allows a free circular movement 10 of the roller (5) in upward and downward direction in a plane comprising the centreline (9) of the roller shaft (6), with said centre of rotation (8) of the hinged connection (7) in a vertical plane being located under the centreline (9) of the roller shaft (6) characterized in that the grinding table (3) is rotatable about the vertical shaft (4) and in that the roller mill (1) comprises means (10,11) for 15 introducing gases into the mill housing (2) and means (12) allowing for continuously diverting ground material suspended in gases out of the mill housing (2).
2. A roller mill according to claim 1 characterized in that the means for 20 introducing gases into the mill housing (2) comprises a number of nozzles (10) mounted in a wall of the mill housing (2).
3. A roller mill according to claim 2 characterized in that one or more of the nozzles (10) mounted in the wall of the mill housing (2) are movably mounted. 25
4. A roller mill according to any of the claims 1 to 3 characterized in that the means for introducing gases into the mill housing (2) comprises a number of nozzles arranged in a nozzle ring (11) enclosing the grinding table (3) allowing the gases to be introduced around the edge of the grinding table (3). 30 WO 2010/012527 PCT/EP2009/056694 8
5. A roller mill according to any of the claims 1 to 4 characterized in that the means for introducing gases into the mill housing (2) comprises a number of vertical louvres being movably arranged around the grinding table (3). 5
6. A roller mill according to any of the claims 1 to 5 characterized in that the means for introducing gases into the mill housing (2) comprises two or more separate feed systems each comprising means such as a fan (13, 14) for introducing gases into the mill housing (2). 10
7. A roller mill according to claim 1, 2, 4 and 6 characterized in that one of the separate feed systems comprises one or more nozzles (10) mounted in a wall of the mill housing (2) and in that the second separate feed system comprises a number of nozzles arranged in a nozzle ring (11) enclosing the grinding table 15 (3).
8. A roller mill according to claim 1 characterized in that the set of rollers and the grinding table (3) are turned in opposite directions. 20
9. A roller mill according to claim 1 characterized in that the set of rollers and the grinding table (3) are turned in the same direction.
AU2009277429A 2008-07-30 2009-06-01 Roller mill for grinding particulate material Abandoned AU2009277429A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DKPA200801048A DK200801048A (en) 2008-07-30 2008-07-30 Roller mill for grinding particulate material
DKPA200801048 2008-07-30
PCT/EP2009/056694 WO2010012527A1 (en) 2008-07-30 2009-06-01 Roller mill for grinding particulate material

Publications (1)

Publication Number Publication Date
AU2009277429A1 true AU2009277429A1 (en) 2010-02-04

Family

ID=41010773

Family Applications (1)

Application Number Title Priority Date Filing Date
AU2009277429A Abandoned AU2009277429A1 (en) 2008-07-30 2009-06-01 Roller mill for grinding particulate material

Country Status (19)

Country Link
US (1) US8727249B2 (en)
EP (1) EP2326424B1 (en)
JP (1) JP2011529385A (en)
KR (1) KR20110055530A (en)
CN (1) CN101918141B (en)
AT (1) ATE549087T1 (en)
AU (1) AU2009277429A1 (en)
BR (1) BRPI0916857A2 (en)
CA (1) CA2708248A1 (en)
DK (2) DK200801048A (en)
EG (1) EG25816A (en)
ES (1) ES2384152T3 (en)
IL (1) IL210871A0 (en)
MA (1) MA32586B1 (en)
MX (1) MX2010007884A (en)
RU (1) RU2459663C1 (en)
UA (1) UA96892C2 (en)
WO (1) WO2010012527A1 (en)
ZA (1) ZA201005320B (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102416354B (en) * 2011-10-28 2015-01-07 黄丽霞 Electric grinding machine
US9604226B2 (en) * 2012-05-01 2017-03-28 Innovative Combustion Technologies, Inc. Pulverizer mill protection system
US9289772B2 (en) 2013-08-01 2016-03-22 Storm Technologies, Inc. System for improving airflow characteristics within a coal pulverizer
DK2985081T3 (en) 2014-08-12 2017-07-10 Loesche Gmbh Process and air flow vertical mill for grinding hot and humid raw material as well as duct-like segment.
CN105964383A (en) * 2016-07-13 2016-09-28 赵云辉 Completely sealed slag discharging system of coal mill with top-mounted motor
CN106638076A (en) * 2016-12-08 2017-05-10 中国宣纸股份有限公司 Grinding device for Chinese art paper raw material
CN110813476B (en) * 2019-11-25 2021-03-02 刘栋 Orthopedics reverse rotation traditional chinese medicine grinds machine
CN114054160B (en) * 2021-12-01 2022-11-01 中国矿业大学 Medium speed pulverizer grinding roller device
CN116618140B (en) * 2023-07-21 2023-10-03 江苏孜品生物科技有限公司 Cleaning agent base material shell crushing and grinding pretreatment equipment and process

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB601299A (en) * 1945-11-29 1948-05-03 Clayton Goodfellow And Company Improvements relating to grinding mills
US3348819A (en) * 1964-12-07 1967-10-24 Nat Eng Co Apparatus for conditioning particulate material
DE2061422A1 (en) * 1970-12-14 1972-06-15 VEB Gisag, χ 7034 Leipzig Bowl crushing machine foundry sand
US3730446A (en) * 1971-10-21 1973-05-01 Babcock & Wilcox Co Pulverizing apparatus
SU1271563A1 (en) * 1980-05-05 1986-11-23 Ивановский Ордена "Знак Почета" Энергетический Институт Им.В.И.Ленина Mill
JPS57140658A (en) * 1981-02-23 1982-08-31 Kobe Steel Ltd Roller mill
DK429583A (en) * 1982-09-24 1984-03-25 Freunt Ind Co Ltd granulator
GB2145351A (en) * 1983-08-24 1985-03-27 Howden James & Co Ltd Pulverizer
SU1271564A1 (en) * 1985-05-05 1986-11-23 Ивановский Ордена "Знак Почета" Энергетический Институт Им.В.И.Ленина Mill
CN1003163B (en) * 1985-07-04 1989-02-01 川崎重工业株式会社 Vertical roller mill
US5667149A (en) * 1995-07-03 1997-09-16 Foster Wheeler Energy Corporation Solids pulverizer mill and process utilizing interactive air port nozzles
JP2000005616A (en) * 1998-06-29 2000-01-11 Shimizu Corp Apparatus for removing sharp part of particle
JP2002370044A (en) * 2001-06-14 2002-12-24 Ishikawajima Harima Heavy Ind Co Ltd Vertical roller mill
DE10141414B4 (en) * 2001-08-23 2004-03-04 Loesche Gmbh Roller mill, airflow roller mill, and method for grinding materials with magnetizable, in particular iron-containing components, for example slags
CN2897435Y (en) * 2006-01-24 2007-05-09 庞德明 Reciprocating re-mill
WO2009007149A1 (en) * 2007-07-11 2009-01-15 Flsmidth A/S Roller mill
US7637446B2 (en) * 2007-08-29 2009-12-29 Flsmidth A/S Roller mill for grinding solid material

Also Published As

Publication number Publication date
RU2459663C1 (en) 2012-08-27
MA32586B1 (en) 2011-08-01
DK200801048A (en) 2010-01-31
US20110114768A1 (en) 2011-05-19
CA2708248A1 (en) 2010-02-04
WO2010012527A1 (en) 2010-02-04
BRPI0916857A2 (en) 2016-02-10
CN101918141B (en) 2014-07-02
MX2010007884A (en) 2010-08-16
US8727249B2 (en) 2014-05-20
CN101918141A (en) 2010-12-15
JP2011529385A (en) 2011-12-08
EP2326424B1 (en) 2012-03-14
UA96892C2 (en) 2011-12-12
KR20110055530A (en) 2011-05-25
ATE549087T1 (en) 2012-03-15
EP2326424A1 (en) 2011-06-01
ZA201005320B (en) 2011-08-31
IL210871A0 (en) 2011-04-28
DK2326424T3 (en) 2012-07-02
EG25816A (en) 2012-08-22
ES2384152T3 (en) 2012-07-02

Similar Documents

Publication Publication Date Title
EP2326424B1 (en) Roller mill for grinding particulate material
AU2009277431B2 (en) Roller mill with application of gas
US8413917B2 (en) Roller mill with gas duct
KR101541426B1 (en) Pulverizer having improved vane wheel
JP2002059017A (en) Vertical roller mill
JP6168404B2 (en) Grinding system
JP2011092818A (en) Vertical mill
JP6497079B2 (en) Vertical crusher
JPH04256449A (en) Vertical crusher
JP6065024B2 (en) Vertical crusher
WO2019098868A1 (en) Methods and devices for continuous disintegration, drying and separation of bulk materials
JP2004113865A (en) Vertical crusher
WO2019031294A1 (en) Vertical pulverizer
JPH0560535U (en) Vertical mill

Legal Events

Date Code Title Description
MK4 Application lapsed section 142(2)(d) - no continuation fee paid for the application